Question: Who is the {sibling} and the {child} of {Vlad_the_Impaler} ?
Paraphrase: Who is related to Vlad the Impaler?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q43715 wdt:P3373 ?ans_1 . wd:Q43715 wdt:P40 ?ans_2 }
Answer: Radu cel Frumos, Ricardo serrano